Disabling Road Rash 1's checksum routine

Discussion in 'Tutorials Archive' started by DanielHall, Oct 16, 2010.

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  1. DanielHall

    DanielHall Well-Known Member Member

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    Road Rash has a strange checksum. When you alter values, instead of a red screen, the game doesn't load.


    To fix, go into your hex editor and go to $7FFD0 and change 66 02 to 4E 75.


    That's it.
     
    DanielHall, Oct 16, 2010
    #1
  2. EMK-20218

    EMK-20218 The Fuss Maker Exiled

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    This works for the Fifa Soccer series, for Mega Man the Wily Wars, and for other Road Rash games?


    I tried to start hacking the Mega Man The Wily Wars ROM in the past but I failed when I noticed this same issue.


    EDIT: 'issue' and 'reason' hasn't the same meaning, EK...
     
    Last edited by a moderator: Oct 16, 2010
    EMK-20218, Oct 16, 2010
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  3. DanielHall

    DanielHall Well-Known Member Member

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    This works with Road Rash 2's checksum routine, only it's found at a different location. ($FF888 IIRC)


    Different games have different locations I think, so it won't be in the same place, no. :(
     
    DanielHall, Oct 16, 2010
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  4. OrdosAlpha

    OrdosAlpha RIGHT! Naebody move! Root Admin

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    I believe EA used the same routine in all their MD games.


    Off-topic (sort of): wish Capcom's checksum routine wasn't a pain in the arse, then I could play the two palette mods I produced for SFII:SCE & SSFII, both of which use palettes closer to the CPS1 and CPS2 originals.
     
    Last edited by a moderator: Nov 22, 2010
    OrdosAlpha, Oct 16, 2010
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  5. DrHackMan

    DrHackMan I don't always herp, but when I herp, I derp Member

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    Here's what you need: http://www.romhacking.net/utils/342/


    It recalculates the Checksums for Genesis/Megadrive and 32x roms
     
    DrHackMan, Oct 17, 2010
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  6. DanielHall

    DanielHall Well-Known Member Member

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    Just what I need! :D
     
    DanielHall, Oct 17, 2010
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  7. EMK-20218

    EMK-20218 The Fuss Maker Exiled

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    This is exactly what I don't need if point on how the checksum routine works in these games I said. This tool didn't works for this.
     
    EMK-20218, Nov 22, 2010
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